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strategy.go
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strategy.go
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/*
* Tencent is pleased to support the open source community by making TKEStack
* available.
*
* Copyright (C) 2012-2019 Tencent. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use
* this file except in compliance with the License. You may obtain a copy of the
* License at
*
* https://opensource.org/licenses/Apache-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
*/
package template
import (
"context"
"fmt"
"k8s.io/apimachinery/pkg/fields"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/util/validation/field"
genericregistry "k8s.io/apiserver/pkg/registry/generic"
"k8s.io/apiserver/pkg/registry/rest"
"k8s.io/apiserver/pkg/storage"
"k8s.io/apiserver/pkg/storage/names"
notifyinternalclient "tkestack.io/tke/api/client/clientset/internalversion/typed/notify/internalversion"
"tkestack.io/tke/api/notify"
"tkestack.io/tke/pkg/apiserver/authentication"
"tkestack.io/tke/pkg/util/log"
namesutil "tkestack.io/tke/pkg/util/names"
)
// Strategy implements verification logic for template.
type Strategy struct {
runtime.ObjectTyper
names.NameGenerator
notifyClient *notifyinternalclient.NotifyClient
}
// NewStrategy creates a strategy that is the default logic that applies when
// creating and updating template objects.
func NewStrategy(notifyClient *notifyinternalclient.NotifyClient) *Strategy {
return &Strategy{notify.Scheme, namesutil.Generator, notifyClient}
}
// DefaultGarbageCollectionPolicy returns the default garbage collection behavior.
func (Strategy) DefaultGarbageCollectionPolicy(ctx context.Context) rest.GarbageCollectionPolicy {
return rest.Unsupported
}
// PrepareForUpdate is invoked on update before validation to normalize the
// object.
func (Strategy) PrepareForUpdate(ctx context.Context, obj, old runtime.Object) {
oldTemplate := old.(*notify.Template)
template, _ := obj.(*notify.Template)
_, tenantID := authentication.GetUsernameAndTenantID(ctx)
if len(tenantID) != 0 {
if oldTemplate.Spec.TenantID != tenantID {
log.Panic("Unauthorized update template information", log.String("oldTenantID", oldTemplate.Spec.TenantID), log.String("newTenantID", template.Spec.TenantID), log.String("userTenantID", tenantID))
}
template.Spec.TenantID = tenantID
}
}
// NamespaceScoped is false for templates.
func (Strategy) NamespaceScoped() bool {
return true
}
// Export strips fields that can not be set by the user.
func (Strategy) Export(ctx context.Context, obj runtime.Object, exact bool) error {
return nil
}
// PrepareForCreate is invoked on create before validation to normalize
// the object.
func (s *Strategy) PrepareForCreate(ctx context.Context, obj runtime.Object) {
_, tenantID := authentication.GetUsernameAndTenantID(ctx)
template, _ := obj.(*notify.Template)
if len(tenantID) != 0 {
template.Spec.TenantID = tenantID
}
if template.Name == "" && template.GenerateName == "" {
template.GenerateName = "tpl-"
}
}
// Validate validates a new template.
func (s *Strategy) Validate(ctx context.Context, obj runtime.Object) field.ErrorList {
return ValidateTemplate(obj.(*notify.Template), s.notifyClient)
}
// AllowCreateOnUpdate is false for templates.
func (Strategy) AllowCreateOnUpdate() bool {
return false
}
// AllowUnconditionalUpdate returns true if the object can be updated
// unconditionally (irrespective of the latest resource version), when there is
// no resource version specified in the object.
func (Strategy) AllowUnconditionalUpdate() bool {
return false
}
// Canonicalize normalizes the object after validation.
func (Strategy) Canonicalize(obj runtime.Object) {
}
// ValidateUpdate is the default update validation for an end template.
func (s *Strategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) field.ErrorList {
return ValidateTemplateUpdate(obj.(*notify.Template), old.(*notify.Template), s.notifyClient)
}
// GetAttrs returns labels and fields of a given object for filtering purposes.
func GetAttrs(obj runtime.Object) (labels.Set, fields.Set, error) {
template, ok := obj.(*notify.Template)
if !ok {
return nil, nil, fmt.Errorf("not a template")
}
return labels.Set(template.ObjectMeta.Labels), ToSelectableFields(template), nil
}
// MatchTemplate returns a generic matcher for a given label and field selector.
func MatchTemplate(label labels.Selector, field fields.Selector) storage.SelectionPredicate {
return storage.SelectionPredicate{
Label: label,
Field: field,
GetAttrs: GetAttrs,
IndexFields: []string{
"spec.tenantID",
"metadata.name",
},
}
}
// ToSelectableFields returns a field set that represents the object
func ToSelectableFields(template *notify.Template) fields.Set {
objectMetaFieldsSet := genericregistry.ObjectMetaFieldsSet(&template.ObjectMeta, false)
specificFieldsSet := fields.Set{
"spec.tenantID": template.Spec.TenantID,
}
return genericregistry.MergeFieldsSets(objectMetaFieldsSet, specificFieldsSet)
}